1 /* 2 * Copyright (c) 2013, 2016-2021 The Linux Foundation. All rights reserved. 3 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. 4 * Copyright (c) 2002-2010, Atheros Communications Inc. 5 * 6 * Permission to use, copy, modify, and/or distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /** 20 * DOC: This contains the functionality to process the radar event generated 21 * for a pulse. This will group together pulses and call various detection 22 * functions to figure out whether a valid radar has been detected. 23 */ 24 25 #include "../dfs.h" 26 #include "../dfs_zero_cac.h" 27 #include "../dfs_channel.h" 28 #include "../dfs_internal.h" 29 #include "../dfs_process_radar_found_ind.h" 30 #include <wlan_objmgr_vdev_obj.h> 31 #include "wlan_dfs_utils_api.h" 32 #include "wlan_dfs_lmac_api.h" 33 #include "../dfs_partial_offload_radar.h" 34 #include "../dfs_confirm_radar.h" 35 36 #ifdef DFS_FCC_TYPE4_DURATION_CHECK 37 #define DFS_WAR_30_MHZ_SEPARATION 30 38 #define DFS_WAR_PEAK_INDEX_ZERO 0 39 #define DFS_TYPE4_WAR_PULSE_DURATION_LOWER_LIMIT 11 40 #define DFS_TYPE4_WAR_PULSE_DURATION_UPPER_LIMIT 33 41 #define DFS_TYPE4_WAR_PRI_LOWER_LIMIT 200 42 #define DFS_TYPE4_WAR_PRI_UPPER_LIMIT 500 43 #define DFS_TYPE4_WAR_VALID_PULSE_DURATION 12 44 #endif 45 46 #define FREQ_5500_MHZ 5500 47 #define FREQ_5500_MHZ 5500 48 49 #define DFS_MAX_FREQ_SPREAD (1375 * 1) 50 #define DFS_LARGE_PRI_MULTIPLIER 4 51 #define DFS_W53_DEFAULT_PRI_MULTIPLIER 2 52 #define DFS_BIG_SIDX 10000 53 54 static char debug_dup[33]; 55 static int debug_dup_cnt; 56 57 /** 58 * dfs_process_pulse_dur() - Process pulse duration. 59 * @dfs: Pointer to wlan_dfs structure. 60 * @re_dur: Duration. 61 * 62 * Convert the hardware provided duration to TSF ticks (usecs) taking the clock 63 * (fast or normal) into account. Legacy (pre-11n, Owl, Sowl, Howl) operate 64 * 5GHz using a 40MHz clock. Later 11n chips (Merlin, Osprey, etc) operate 65 * 5GHz using a 44MHz clock, so the reported pulse durations are different. 66 * Peregrine reports the pulse duration in microseconds regardless of the 67 * operating mode. (XXX TODO: verify this, obviously.) 68 * 69 * The hardware returns the duration in a variety of formats, 70 * so it's converted from the hardware format to TSF (usec) 71 * values here. 72 * XXX TODO: this should really be done when the PHY error 73 * is processed, rather than way out here.. 74 * 75 * 76 * Return: Returns the duration. 77 */ 78 static inline uint8_t dfs_process_pulse_dur(struct wlan_dfs *dfs, 79 uint8_t re_dur) 80 { 81 /* 82 * Short pulses are sometimes returned as having a duration of 0, 83 * so round those up to 1. 84 * XXX This holds true for BB TLV chips too, right? 85 */ 86 if (re_dur == 0) 87 return 1; 88 89 /* 90 * For BB TLV chips, the hardware always returns microsecond pulse 91 * durations. 92 */ 93 if (dfs->dfs_caps.wlan_chip_is_bb_tlv) 94 return re_dur; 95 96 /* 97 * This is for 11n and legacy chips, which may or may not use the 5GHz 98 * fast clock mode. 99 */ 100 /* Convert 0.8us durations to TSF ticks (usecs) */ 101 return (uint8_t)dfs_round((int32_t)((dfs->dur_multiplier)*re_dur)); 102 } 103 104 #ifdef DFS_FCC_TYPE4_DURATION_CHECK 105 /* 106 * dfs_dur_check() - Modify the pulse duration for FCC Type 4 and JAPAN W56 107 * Type 8 radar pulses when the conditions mentioned in the 108 * function body are reported in the radar summary report. 109 * @dfs: Pointer to wlan_dfs structure. 110 * @chan: Current channel. 111 * @re: Pointer to dfs_event. 112 * @diff_ts: timestamp of current pulse - timestamp of last pulse. 113 * 114 * return: Void 115 */ 116 static inline void dfs_dur_check( 117 struct wlan_dfs *dfs, 118 struct dfs_channel *chan, 119 struct dfs_event *re, 120 uint32_t diff_ts) 121 { 122 if ((dfs->dfsdomain == DFS_FCC_DOMAIN || 123 dfs->dfsdomain == DFS_MKK4_DOMAIN || 124 dfs->dfsdomain == DFS_MKKN_DOMAIN) && 125 ((chan->dfs_ch_flags & WLAN_CHAN_VHT80) == WLAN_CHAN_VHT80) && 126 (DFS_DIFF(chan->dfs_ch_freq, chan->dfs_ch_mhz_freq_seg1) == 127 DFS_WAR_30_MHZ_SEPARATION) && 128 re->re_sidx == DFS_WAR_PEAK_INDEX_ZERO && 129 (re->re_dur > DFS_TYPE4_WAR_PULSE_DURATION_LOWER_LIMIT && 130 re->re_dur < DFS_TYPE4_WAR_PULSE_DURATION_UPPER_LIMIT) && 131 (diff_ts > DFS_TYPE4_WAR_PRI_LOWER_LIMIT && 132 diff_ts < DFS_TYPE4_WAR_PRI_UPPER_LIMIT)) { 133 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, 134 "chan flags=%llu, Pri Chan %d MHz center %d MHZ", 135 chan->dfs_ch_flags, 136 chan->dfs_ch_freq, chan->dfs_ch_mhz_freq_seg1); 137 138 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, 139 "Report Peak Index = %d,re.re_dur = %d,diff_ts = %d", 140 re->re_sidx, re->re_dur, diff_ts); 141 142 re->re_dur = DFS_TYPE4_WAR_VALID_PULSE_DURATION; 143 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, 144 "Modifying the pulse duration to %d", re->re_dur); 145 } 146 } 147 #else 148 static inline void dfs_dur_check( 149 struct wlan_dfs *dfs, 150 struct dfs_channel *chan, 151 struct dfs_event *re, 152 uint32_t diff_ts) 153 { 154 } 155 #endif 156 157 /* 158 * dfs_print_radar_events() - Prints the Radar events. 159 * @dfs: Pointer to wlan_dfs structure. 160 */ 161 static void dfs_print_radar_events(struct wlan_dfs *dfs) 162 { 163 int i; 164 165 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, "#Phyerr=%d, #false detect=%d, #queued=%d", 166 dfs->dfs_phyerr_count, dfs->dfs_phyerr_reject_count, 167 dfs->dfs_phyerr_queued_count); 168 169 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, "dfs_phyerr_freq_min=%d, dfs_phyerr_freq_max=%d", 170 dfs->dfs_phyerr_freq_min, dfs->dfs_phyerr_freq_max); 171 172 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, 173 "Total radar events detected=%d, entries in the radar queue follows:", 174 dfs->dfs_event_log_count); 175 176 for (i = 0; (i < DFS_EVENT_LOG_SIZE) && (i < dfs->dfs_event_log_count); 177 i++) { 178 dfs_debug(dfs, WLAN_DEBUG_DFS, 179 "ts=%llu diff_ts=%u rssi=%u dur=%u, is_chirp=%d, seg_id=%d, sidx=%d, freq_offset=%d.%dMHz, peak_mag=%d, total_gain=%d, mb_gain=%d, relpwr_db=%d, delta_diff=%d, delta_peak=%d, psidx_diff=%d", 180 dfs->radar_log[i].ts, dfs->radar_log[i].diff_ts, 181 dfs->radar_log[i].rssi, dfs->radar_log[i].dur, 182 dfs->radar_log[i].is_chirp, dfs->radar_log[i].seg_id, 183 dfs->radar_log[i].sidx, 184 (int)dfs->radar_log[i].freq_offset_khz / 1000, 185 (int)abs(dfs->radar_log[i].freq_offset_khz) % 1000, 186 dfs->radar_log[i].peak_mag, 187 dfs->radar_log[i].total_gain, 188 dfs->radar_log[i].mb_gain, 189 dfs->radar_log[i].relpwr_db, 190 dfs->radar_log[i].delta_diff, 191 dfs->radar_log[i].delta_peak, 192 dfs->radar_log[i].psidx_diff); 193 } 194 dfs->dfs_event_log_count = 0; 195 dfs->dfs_phyerr_count = 0; 196 dfs->dfs_phyerr_reject_count = 0; 197 dfs->dfs_phyerr_queued_count = 0; 198 dfs->dfs_phyerr_freq_min = 0x7fffffff; 199 dfs->dfs_phyerr_freq_max = 0; 200 } 201 202 #ifndef CONFIG_EXT_RADAR_PROCESS 203 /** 204 * dfs_is_real_radar() - This function checks for fractional PRI and jitter in 205 * sidx index to determine if the radar is real or not. 206 * @dfs: Pointer to dfs structure. 207 * @rf: Pointer to dfs_filter structure. 208 * @ext_chan_flag: ext chan flags. 209 * 210 * Return : true if real RADAR else false. 211 */ 212 static bool dfs_is_real_radar(struct wlan_dfs *dfs, 213 struct dfs_filter *rf, 214 int ext_chan_flag) 215 { 216 int i = 0; 217 int index; 218 struct dfs_delayline *dl = &rf->rf_dl; 219 struct dfs_delayelem *de; 220 uint64_t target_ts = 0; 221 struct dfs_pulseline *pl; 222 int start_index = 0, current_index, next_index; 223 unsigned char scores[FRAC_PRI_SCORE_ARRAY_SIZE]; 224 uint32_t pri_margin; 225 uint64_t this_diff_ts; 226 uint32_t search_bin; 227 228 unsigned char max_score = 0; 229 int max_score_index = 0; 230 231 pl = dfs->pulses; 232 233 OS_MEMZERO(scores, sizeof(scores)); 234 scores[0] = rf->rf_threshold; 235 236 pri_margin = dfs_get_pri_margin(dfs, ext_chan_flag, 237 (rf->rf_patterntype == 1)); 238 239 /* 240 * Look for the entry that matches dl_seq_num_second. 241 * we need the time stamp and diff_ts from there. 242 */ 243 244 for (i = 0; i < dl->dl_numelems; i++) { 245 index = (dl->dl_firstelem + i) & DFS_MAX_DL_MASK; 246 de = &dl->dl_elems[index]; 247 if (dl->dl_seq_num_second == de->de_seq_num) 248 target_ts = de->de_ts - de->de_time; 249 } 250 251 if (dfs->dfs_debug_mask & WLAN_DEBUG_DFS2) { 252 dfs_print_delayline(dfs, &rf->rf_dl); 253 254 dfs_debug(dfs, WLAN_DEBUG_DFS2, "Pulse Line"); 255 for (i = 0; i < pl->pl_numelems; i++) { 256 index = (pl->pl_firstelem + i) & 257 DFS_MAX_PULSE_BUFFER_MASK; 258 dfs_debug(dfs, WLAN_DEBUG_DFS2, 259 "Elem %u: ts=%llu dur=%u, seq_num=%d, delta_peak=%d, psidx_diff=%d\n", 260 i, pl->pl_elems[index].p_time, 261 pl->pl_elems[index].p_dur, 262 pl->pl_elems[index].p_seq_num, 263 pl->pl_elems[index].p_delta_peak, 264 pl->pl_elems[index].p_psidx_diff); 265 } 266 } 267 268 /* 269 * Walk through the pulse line and find pulse with target_ts. 270 * Then continue until we find entry with seq_number dl_seq_num_stop. 271 */ 272 273 for (i = 0; i < pl->pl_numelems; i++) { 274 index = (pl->pl_firstelem + i) & DFS_MAX_PULSE_BUFFER_MASK; 275 if (pl->pl_elems[index].p_time == target_ts) { 276 dl->dl_seq_num_start = pl->pl_elems[index].p_seq_num; 277 start_index = index; /* save for future use */ 278 } 279 } 280 281 dfs_debug(dfs, WLAN_DEBUG_DFS2, 282 "target_ts=%llu, dl_seq_num_start=%d, dl_seq_num_second=%d, dl_seq_num_stop=%d", 283 target_ts, dl->dl_seq_num_start, 284 dl->dl_seq_num_second, dl->dl_seq_num_stop); 285 286 current_index = start_index; 287 while (pl->pl_elems[current_index].p_seq_num < dl->dl_seq_num_stop) { 288 next_index = (current_index + 1) & DFS_MAX_PULSE_BUFFER_MASK; 289 this_diff_ts = pl->pl_elems[next_index].p_time - 290 pl->pl_elems[current_index].p_time; 291 292 /* Now update the score for this diff_ts */ 293 for (i = 1; i < FRAC_PRI_SCORE_ARRAY_SIZE; i++) { 294 search_bin = dl->dl_search_pri / (i + 1); 295 296 /* 297 * We do not give score to PRI that is lower then the 298 * limit. 299 */ 300 if (search_bin < dfs->dfs_lowest_pri_limit) 301 break; 302 303 /* 304 * Increment the score if this_diff_ts belongs to this 305 * search_bin +/- margin. 306 */ 307 if ((this_diff_ts >= (search_bin - pri_margin)) && 308 (this_diff_ts <= 309 (search_bin + pri_margin))) { 310 /*increment score */ 311 scores[i]++; 312 } 313 } 314 current_index = next_index; 315 } 316 317 for (i = 0; i < FRAC_PRI_SCORE_ARRAY_SIZE; i++) 318 if (scores[i] > max_score) { 319 max_score = scores[i]; 320 max_score_index = i; 321 } 322 323 if (max_score_index != 0) { 324 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, 325 "Rejecting Radar since Fractional PRI detected: searchpri=%d, threshold=%d, fractional PRI=%d, Fractional PRI score=%d", 326 dl->dl_search_pri, scores[0], 327 dl->dl_search_pri/(max_score_index + 1), 328 max_score); 329 return 0; 330 } 331 332 333 /* Check for frequency spread */ 334 if (dl->dl_min_sidx > pl->pl_elems[start_index].p_sidx) 335 dl->dl_min_sidx = pl->pl_elems[start_index].p_sidx; 336 337 if (dl->dl_max_sidx < pl->pl_elems[start_index].p_sidx) 338 dl->dl_max_sidx = pl->pl_elems[start_index].p_sidx; 339 340 if ((dl->dl_max_sidx - dl->dl_min_sidx) > rf->rf_sidx_spread) { 341 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, 342 "Rejecting Radar since frequency spread is too large : min_sidx=%d, max_sidx=%d, rf_sidx_spread=%d", 343 dl->dl_min_sidx, dl->dl_max_sidx, 344 rf->rf_sidx_spread); 345 return 0; 346 } 347 348 if ((rf->rf_check_delta_peak) && 349 ((dl->dl_delta_peak_match_count + 350 dl->dl_psidx_diff_match_count - 1) < 351 rf->rf_threshold)) { 352 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, 353 "Rejecting Radar since delta peak values are invalid : dl_delta_peak_match_count=%d, dl_psidx_diff_match_count=%d, rf_threshold=%d", 354 dl->dl_delta_peak_match_count, 355 dl->dl_psidx_diff_match_count, 356 rf->rf_threshold); 357 return 0; 358 } 359 dfs_debug(dfs, WLAN_DEBUG_DFS_FALSE_DET, 360 "dl->dl_min_sidx: %d, dl->dl_max_sidx: %d", 361 dl->dl_min_sidx, dl->dl_max_sidx); 362 363 dfs->dfs_freq_offset = DFS_SIDX_TO_FREQ_OFFSET((dl->dl_min_sidx + 364 dl->dl_max_sidx) / 2); 365 return 1; 366 } 367 #endif /* CONFIG_EXT_RADAR_PROCESS */ 368 369 /* 370 * dfs_reject_on_pri() - Rejecting on individual filter based on min PRI . 371 * @dfs: Pointer to wlan_dfs structure. 372 * @rf: Pointer to dfs_filter structure. 373 * @deltaT: deltaT value. 374 * @this_ts: Timestamp. 375 */ 376 static inline bool dfs_reject_on_pri( 377 struct wlan_dfs *dfs, 378 struct dfs_filter *rf, 379 uint64_t deltaT, 380 uint64_t this_ts) 381 { 382 if ((deltaT < rf->rf_minpri) && (deltaT != 0)) { 383 /* Second line of PRI filtering. */ 384 dfs_debug(dfs, WLAN_DEBUG_DFS2, 385 "filterID %d : Rejecting on individual filter min PRI deltaT=%lld rf->rf_minpri=%u", 386 rf->rf_pulseid, (uint64_t)deltaT, 387 rf->rf_minpri); 388 return 1; 389 } 390 391 if (rf->rf_ignore_pri_window > 0) { 392 if (deltaT < rf->rf_minpri) { 393 dfs_debug(dfs, WLAN_DEBUG_DFS2, 394 "filterID %d : Rejecting on individual filter max PRI deltaT=%lld rf->rf_minpri=%u", 395 rf->rf_pulseid, (uint64_t)deltaT, 396 rf->rf_minpri); 397 /* But update the last time stamp. */ 398 rf->rf_dl.dl_last_ts = this_ts; 399 return 1; 400 } 401 } else { 402 /* 403 * The HW may miss some pulses especially with 404 * high channel loading. This is true for Japan 405 * W53 where channel loaoding is 50%. Also for 406 * ETSI where channel loading is 30% this can 407 * be an issue too. To take care of missing 408 * pulses, we introduce pri_margin multiplie. 409 * This is normally 2 but can be higher for W53. 410 */ 411 412 if ((deltaT > (dfs->dfs_pri_multiplier * rf->rf_maxpri)) || 413 (deltaT < rf->rf_minpri)) { 414 dfs_debug(dfs, WLAN_DEBUG_DFS2, 415 "filterID %d : Rejecting on individual filter max PRI deltaT=%lld rf->rf_minpri=%u", 416 rf->rf_pulseid, (uint64_t) deltaT, 417 rf->rf_minpri); 418 /* But update the last time stamp. */ 419 rf->rf_dl.dl_last_ts = this_ts; 420 return 1; 421 } 422 } 423 424 return 0; 425 } 426 427 /** 428 * dfs_confirm_radar_check() - Do additioal check to conirm radar except for 429 * the staggered, chirp FCC Bin 5, frequency hopping indicated by 430 * rf_patterntype == 1. 431 * @dfs: Pointer to wlan_dfs structure. 432 * @rf: Pointer to dfs_filter structure. 433 * @ext_chan_event_flag: Extension channel event flag 434 * @found: Pointer to radar found flag (return value). 435 * @false_radar_found: Pointer to false radar found (return value). 436 */ 437 438 static inline void dfs_confirm_radar_check( 439 struct wlan_dfs *dfs, 440 struct dfs_filter *rf, 441 int ext_chan_event_flag, 442 int *found, 443 int *false_radar_found) 444 { 445 if (rf->rf_patterntype != 1) { 446 *found = (int)dfs_is_real_radar(dfs, rf, ext_chan_event_flag); 447 *false_radar_found = (*found == 1) ? 0 : 1; 448 } 449 } 450 451 /* 452 * __dfs_process_radarevent() - Continuation of process a radar event function. 453 * @dfs: Pointer to wlan_dfs structure. 454 * @ft: Pointer to dfs_filtertype structure. 455 * @re: Pointer to dfs_event structure. 456 * @this_ts: Timestamp. 457 * 458 * There is currently no way to specify that a radar event has occurred on 459 * a specific channel, so the current methodology is to mark both the pri 460 * and ext channels as being unavailable. This should be fixed for 802.11ac 461 * or we'll quickly run out of valid channels to use. 462 * 463 * Return: If a radar event is found, return 1. Otherwise, return 0. 464 */ 465 static void __dfs_process_radarevent(struct wlan_dfs *dfs, 466 struct dfs_filtertype *ft, 467 struct dfs_event *re, 468 uint64_t this_ts, 469 int *found, 470 int *false_radar_found) 471 { 472 int p; 473 uint64_t deltaT = 0; 474 int ext_chan_event_flag = 0; 475 struct dfs_filter *rf = NULL; 476 int8_t ori_rf_check_delta_peak = 0; 477 478 for (p = 0, *found = 0; (p < ft->ft_numfilters) && 479 (!(*found)) && !(*false_radar_found); p++) { 480 rf = ft->ft_filters[p]; 481 if ((re->re_dur >= rf->rf_mindur) && 482 (re->re_dur <= rf->rf_maxdur)) { 483 /* The above check is probably not necessary. */ 484 deltaT = (this_ts < rf->rf_dl.dl_last_ts) ? 485 (int64_t)((DFS_TSF_WRAP - rf->rf_dl.dl_last_ts) + 486 this_ts + 1) : 487 this_ts - rf->rf_dl.dl_last_ts; 488 489 if (dfs_reject_on_pri(dfs, rf, deltaT, this_ts)) 490 continue; 491 492 dfs_add_pulse(dfs, rf, re, deltaT, this_ts); 493 494 /* 495 * If this is an extension channel event, flag it for 496 * false alarm reduction. 497 */ 498 if (re->re_chanindex == dfs->dfs_extchan_radindex) 499 ext_chan_event_flag = 1; 500 501 if (rf->rf_patterntype == 2) { 502 *found = dfs_staggered_check(dfs, rf, 503 (uint32_t) deltaT, re->re_dur); 504 } else { 505 *found = dfs_bin_check(dfs, rf, 506 (uint32_t) deltaT, re->re_dur, 507 ext_chan_event_flag); 508 509 if (*found && 510 (utils_get_dfsdomain(dfs->dfs_pdev_obj) != 511 DFS_CN_DOMAIN)) { 512 ori_rf_check_delta_peak = 513 rf->rf_check_delta_peak; 514 /* 515 * If FW does not send valid psidx_diff 516 * Do not do chirp check. 517 */ 518 if (rf->rf_check_delta_peak && 519 (!(re->re_flags & 520 DFS_EVENT_VALID_PSIDX_DIFF))) 521 rf->rf_check_delta_peak = false; 522 dfs_confirm_radar_check(dfs, 523 rf, ext_chan_event_flag, 524 found, 525 false_radar_found); 526 rf->rf_check_delta_peak = 527 ori_rf_check_delta_peak; 528 } 529 } 530 531 if (dfs->dfs_debug_mask & WLAN_DEBUG_DFS2) 532 if (rf->rf_patterntype != 533 WLAN_DFS_RF_PATTERN_TYPE_1) 534 dfs_print_delayline(dfs, &rf->rf_dl); 535 536 rf->rf_dl.dl_last_ts = this_ts; 537 } 538 } 539 540 if (*found) { 541 dfs_debug(dfs, WLAN_DEBUG_DFS_ALWAYS, 542 "Found on channel minDur = %d, filterId = %d", 543 ft->ft_mindur, 544 rf ? rf->rf_pulseid : -1); 545 } 546 547 return; 548 } 549 550 /** 551 * dfs_cal_average_radar_parameters() - Calculate the average radar parameters. 552 * @dfs: Pointer to wlan_dfs structure. 553 */ 554 #if defined(WLAN_DFS_PARTIAL_OFFLOAD) && defined(HOST_DFS_SPOOF_TEST) 555 static void dfs_cal_average_radar_parameters(struct wlan_dfs *dfs) 556 { 557 int i, count = 0; 558 u_int32_t total_pri = 0; 559 u_int32_t total_duration = 0; 560 u_int32_t total_sidx = 0; 561 562 /* Calculating average PRI, Duration, SIDX from 563 * the 2nd pulse, ignoring the 1st pulse (radar_log[0]). 564 * This is because for the first pulse, the diff_ts will be 565 * (0 - current_ts) which will be a huge value. 566 * Average PRI computation will be wrong. FW returns a 567 * failure test result as PRI does not match their expected 568 * value. 569 */ 570 571 for (i = 1; (i < DFS_EVENT_LOG_SIZE) && (i < dfs->dfs_event_log_count); 572 i++) { 573 total_pri += dfs->radar_log[i].diff_ts; 574 total_duration += dfs->radar_log[i].dur; 575 total_sidx += dfs->radar_log[i].sidx; 576 count++; 577 } 578 579 if (count > 0) { 580 dfs->dfs_average_pri = total_pri / count; 581 dfs->dfs_average_duration = total_duration / count; 582 dfs->dfs_average_sidx = total_sidx / count; 583 584 dfs_debug(dfs, WLAN_DEBUG_DFS2, 585 "Avg.PRI =%u, Avg.duration =%u Avg.sidx =%u", 586 dfs->dfs_average_pri, 587 dfs->dfs_average_duration, 588 dfs->dfs_average_sidx); 589 } 590 } 591 #else 592 static void dfs_cal_average_radar_parameters(struct wlan_dfs *dfs) 593 { 594 } 595 #endif 596 597 /** 598 * dfs_radarfound_reset_vars() - Reset dfs variables after radar found 599 * @dfs: Pointer to wlan_dfs structure. 600 * @rs: Pointer to dfs_state. 601 * @chan: Current channel. 602 * @seg_id: Segment id. 603 */ 604 static inline void dfs_radarfound_reset_vars( 605 struct wlan_dfs *dfs, 606 struct dfs_state *rs, 607 struct dfs_channel *chan, 608 uint8_t seg_id) 609 { 610 struct dfs_channel *thischan; 611 612 /* 613 * TODO: Instead of discarding the radar, create a workqueue 614 * if the channel change is happening through userspace and 615 * process the radar event once the channel change is completed. 616 */ 617 618 /* Collect stats */ 619 dfs->wlan_dfs_stats.num_radar_detects++; 620 thischan = &rs->rs_chan; 621 if ((seg_id == SEG_ID_SECONDARY) && 622 (dfs_is_precac_timer_running(dfs))) 623 dfs->is_radar_during_precac = 1; 624 625 /* 626 * If event log is on then dump the radar event queue on 627 * filter match. This can be used to collect information 628 * on false radar detection. 629 */ 630 if (dfs->dfs_event_log_on) { 631 dfs_cal_average_radar_parameters(dfs); 632 dfs_print_radar_events(dfs); 633 } 634 635 dfs_reset_radarq(dfs); 636 dfs_reset_alldelaylines(dfs); 637 638 dfs_debug(dfs, WLAN_DEBUG_DFS1, 639 "Primary channel freq = %u flags=0x%x", 640 chan->dfs_ch_freq, chan->dfs_ch_flagext); 641 642 if (chan->dfs_ch_freq != thischan->dfs_ch_freq) 643 dfs_debug(dfs, WLAN_DEBUG_DFS1, 644 "Ext channel freq = %u flags=0x%x", 645 thischan->dfs_ch_freq, 646 thischan->dfs_ch_flagext); 647 648 dfs->dfs_phyerr_freq_min = 0x7fffffff; 649 dfs->dfs_phyerr_freq_max = 0; 650 dfs->dfs_phyerr_w53_counter = 0; 651 652 if (seg_id == SEG_ID_SECONDARY) { 653 dfs->wlan_dfs_stats.num_seg_two_radar_detects++; 654 dfs->is_radar_found_on_secondary_seg = 1; 655 } 656 } 657 658 /* 659 * dfs_print_radar_found_freq() - Print radar found frequency. 660 * @dfs: Pointer to wlan_dfs. 661 */ 662 #ifdef CONFIG_CHAN_FREQ_API 663 static void dfs_print_radar_found_freq(struct wlan_dfs *dfs) 664 { 665 dfs_debug(dfs, WLAN_DEBUG_DFS, 666 "bangradar on 2nd segment cfreq = %u", 667 dfs->dfs_precac_secondary_freq_mhz); 668 } 669 #endif 670 671 /** 672 * dfs_handle_bangradar - Handle the case of bangradar 673 * @dfs: Pointer to wlan_dfs structure. 674 * @chan: Current channel. 675 * @rs: Pointer to dfs_state. 676 * Return: if bangradar then return 1. Otherwise, return 0. 677 */ 678 static inline int dfs_handle_bangradar( 679 struct wlan_dfs *dfs, 680 struct dfs_channel *chan, 681 struct dfs_state **rs, 682 uint8_t *seg_id, 683 int *retval) 684 { 685 686 if (dfs->dfs_bangradar_type) { 687 if (dfs->dfs_bangradar_type >= DFS_INVALID_BANGRADAR_TYPE) { 688 dfs_debug(dfs, WLAN_DEBUG_DFS, 689 "Invalid bangradar type"); 690 return 1; 691 } 692 /* All bangradars are processed similarly. 693 * arguments for the bangradar are already stored in 694 * respective dfs structures. 695 */ 696 697 *rs = &dfs->dfs_radar[dfs->dfs_curchan_radindex]; 698 if (dfs->dfs_seg_id == SEG_ID_SECONDARY) { 699 if (dfs_is_precac_timer_running(dfs) || 700 WLAN_IS_CHAN_11AC_VHT160(chan) || 701 WLAN_IS_CHAN_11AC_VHT80_80(chan)) { 702 dfs->is_radar_found_on_secondary_seg = 1; 703 dfs_print_radar_found_freq(dfs); 704 } else { 705 dfs_debug(dfs, WLAN_DEBUG_DFS, 706 "No second segment"); 707 return 1; 708 } 709 } 710 *seg_id = dfs->dfs_seg_id; 711 dfs_debug(dfs, WLAN_DEBUG_DFS, "bangradar %d", 712 dfs->dfs_bangradar_type); 713 *retval = 1; 714 return 1; 715 } 716 return 0; 717 } 718 719 /** 720 * dfs_process_w53_pulses() - Prrocess w53 pulses 721 * @dfs: Pointer to wlan_dfs structure. 722 * 723 * For chips that support frequency information, we can relax PRI 724 * restriction if the frequency spread is narrow. 725 */ 726 static inline void dfs_process_w53_pulses( 727 struct wlan_dfs *dfs) 728 { 729 if ((dfs->dfs_phyerr_freq_max - dfs->dfs_phyerr_freq_min) < 730 DFS_MAX_FREQ_SPREAD) 731 dfs->dfs_pri_multiplier = DFS_LARGE_PRI_MULTIPLIER; 732 733 dfs_debug(dfs, WLAN_DEBUG_DFS1, 734 "w53_counter=%d, freq_max=%d, freq_min=%d, pri_multiplier=%d", 735 dfs->dfs_phyerr_w53_counter, 736 dfs->dfs_phyerr_freq_max, dfs->dfs_phyerr_freq_min, 737 dfs->dfs_pri_multiplier); 738 739 dfs->dfs_phyerr_freq_min = 0x7fffffff; 740 dfs->dfs_phyerr_freq_max = 0; 741 } 742 743 /** 744 * dfs_handle_missing_pulses - Handle the case of missing pulses 745 * @dfs: Pointer to wlan_dfs structure. 746 * @chan: Current channel. 747 * 748 * The HW may miss some pulses especially with high channel loading. 749 * This is true for Japan W53 where channel loaoding is 50%. Also 750 * for ETSI where channel loading is 30% this can be an issue too. 751 * To take care of missing pulses, we introduce pri_margin multiplie. 752 * This is normally 2 but can be higher for W53. 753 * Return: If not enough pulses return 0. Otherwise, return 1. 754 */ 755 static inline int dfs_handle_missing_pulses( 756 struct wlan_dfs *dfs, 757 struct dfs_channel *chan) 758 { 759 if ((dfs->dfsdomain == DFS_MKK4_DOMAIN || 760 dfs->dfsdomain == DFS_MKKN_DOMAIN) && 761 (dfs->dfs_caps.wlan_chip_is_bb_tlv) && 762 (chan->dfs_ch_freq < FREQ_5500_MHZ)) { 763 dfs->dfs_pri_multiplier = DFS_W53_DEFAULT_PRI_MULTIPLIER; 764 /* 765 * Do not process W53 pulses unless we have a minimum number 766 * of them. 767 */ 768 if (dfs->dfs_phyerr_w53_counter >= 5) 769 dfs_process_w53_pulses(dfs); 770 else 771 return 0; 772 } 773 774 dfs_debug(dfs, WLAN_DEBUG_DFS1, "pri_multiplier=%d", 775 dfs->dfs_pri_multiplier); 776 777 return 1; 778 } 779 780 /** 781 * dfs_is_radarq_empty - check if radarq is empty 782 * @dfs: Pointer to wlan_dfs structure. 783 * @empty: Pointer to empty 784 */ 785 static inline void dfs_is_radarq_empty( 786 struct wlan_dfs *dfs, 787 int *empty) 788 { 789 WLAN_DFSQ_LOCK(dfs); 790 *empty = STAILQ_EMPTY(&(dfs->dfs_radarq)); 791 WLAN_DFSQ_UNLOCK(dfs); 792 } 793 794 /** 795 * dfs_remove_event_from_radarq - remove event from radarq 796 * @dfs: Pointer to wlan_dfs structure. 797 * @event: Double pointer to the event structure 798 */ 799 static inline void dfs_remove_event_from_radarq( 800 struct wlan_dfs *dfs, 801 struct dfs_event **event) 802 { 803 WLAN_DFSQ_LOCK(dfs); 804 *event = STAILQ_FIRST(&(dfs->dfs_radarq)); 805 if (*event) 806 STAILQ_REMOVE_HEAD(&(dfs->dfs_radarq), re_list); 807 WLAN_DFSQ_UNLOCK(dfs); 808 } 809 810 /** 811 * dfs_return_event_to_eventq - return event to eventq 812 * @dfs: Pointer to wlan_dfs structure. 813 * @event: Pointer to the event structure 814 */ 815 static inline void dfs_return_event_to_eventq( 816 struct wlan_dfs *dfs, 817 struct dfs_event *event) 818 { 819 qdf_mem_zero(event, sizeof(struct dfs_event)); 820 WLAN_DFSEVENTQ_LOCK(dfs); 821 STAILQ_INSERT_TAIL(&(dfs->dfs_eventq), event, re_list); 822 WLAN_DFSEVENTQ_UNLOCK(dfs); 823 } 824 825 /** 826 * dfs_log_event - log dfs event 827 * @dfs: Pointer to wlan_dfs structure. 828 * @re: Pointer to dfs_event re 829 * @this_ts: Current time stamp 64bit 830 * @diff_ts: Difference between 2 timestamps 32bit 831 * @index: Index value. 832 */ 833 static inline void dfs_log_event( 834 struct wlan_dfs *dfs, 835 struct dfs_event *re, 836 uint64_t this_ts, 837 uint32_t diff_ts, 838 uint32_t index) 839 { 840 uint8_t i; 841 struct dfs_pulseline *pl = dfs->pulses; 842 843 if (dfs->dfs_event_log_on) { 844 i = dfs->dfs_event_log_count % DFS_EVENT_LOG_SIZE; 845 dfs->radar_log[i].ts = this_ts; 846 dfs->radar_log[i].diff_ts = diff_ts; 847 dfs->radar_log[i].rssi = (*re).re_rssi; 848 dfs->radar_log[i].dur = (*re).re_dur; 849 dfs->radar_log[i].seg_id = (*re).re_seg_id; 850 dfs->radar_log[i].sidx = (*re).re_sidx; 851 dfs->radar_log[i].freq_offset_khz = 852 (*re).re_freq_offset_khz; 853 dfs->radar_log[i].peak_mag = (*re).re_peak_mag; 854 dfs->radar_log[i].total_gain = (*re).re_total_gain; 855 dfs->radar_log[i].mb_gain = (*re).re_mb_gain; 856 dfs->radar_log[i].relpwr_db = (*re).re_relpwr_db; 857 dfs->radar_log[i].delta_diff = (*re).re_delta_diff; 858 dfs->radar_log[i].delta_peak = (*re).re_delta_peak; 859 dfs->radar_log[i].psidx_diff = (*re).re_psidx_diff; 860 dfs->radar_log[i].is_chirp = DFS_EVENT_NOTCHIRP(re) ? 861 0 : 1; 862 dfs->dfs_event_log_count++; 863 } 864 865 dfs->dfs_seq_num++; 866 pl->pl_elems[index].p_seq_num = dfs->dfs_seq_num; 867 } 868 869 /** 870 * dfs_check_if_nonbin5 - Check if radar, other than bin5, is found 871 * @dfs: Pointer to wlan_dfs structure. 872 * @re: Pointer to re (radar event) 873 * @rs: Double Pointer to rs (radar state) 874 * @this_ts: Current time stamp 64bit 875 * @diff_ts: Difference between 2 timestamps 32bit 876 * @found: Pointer to found. If radar found or not. 877 * @retval: Pointer to retval(return value). 878 * @false_radar_found: Pointer to false_radar_found(return value). 879 */ 880 static inline void dfs_check_if_nonbin5( 881 struct wlan_dfs *dfs, 882 struct dfs_event *re, 883 struct dfs_state **rs, 884 uint64_t this_ts, 885 uint32_t diff_ts, 886 int *found, 887 int *retval, 888 int *false_radar_found) 889 { 890 891 uint32_t tabledepth = 0; 892 struct dfs_filtertype *ft; 893 uint64_t deltaT; 894 895 dfs_debug(dfs, WLAN_DEBUG_DFS1, 896 " *** chan freq (%d): ts %llu dur %u rssi %u", 897 (*rs)->rs_chan.dfs_ch_freq, (uint64_t)this_ts, 898 (*re).re_dur, (*re).re_rssi); 899 900 while ((tabledepth < DFS_MAX_RADAR_OVERLAP) && 901 ((dfs->dfs_ftindextable[(*re).re_dur])[tabledepth] != 902 -1) && (!*retval) && !(*false_radar_found)) { 903 ft = dfs->dfs_radarf[((dfs->dfs_ftindextable[(*re).re_dur]) 904 [tabledepth])]; 905 dfs_debug(dfs, WLAN_DEBUG_DFS2, 906 " ** RD (%d): ts %x dur %u rssi %u", 907 (*rs)->rs_chan.dfs_ch_freq, (*re).re_ts, 908 (*re).re_dur, (*re).re_rssi); 909 910 if ((*re).re_rssi < ft->ft_rssithresh && 911 (*re).re_dur > MAX_DUR_FOR_LOW_RSSI) { 912 dfs_debug(dfs, WLAN_DEBUG_DFS2, 913 "Rejecting on rssi rssi=%u thresh=%u", 914 (*re).re_rssi, 915 ft->ft_rssithresh); 916 tabledepth++; 917 continue; 918 } 919 deltaT = this_ts - ft->ft_last_ts; 920 dfs_debug(dfs, WLAN_DEBUG_DFS2, 921 "deltaT = %lld (ts: 0x%llx) (last ts: 0x%llx)", 922 (uint64_t)deltaT, (uint64_t)this_ts, 923 (uint64_t)ft->ft_last_ts); 924 925 if ((deltaT < ft->ft_minpri) && (deltaT != 0)) { 926 /* 927 * This check is for the whole filter type. 928 * Individual filters will check this again. 929 * This is first line of filtering. 930 */ 931 dfs_debug(dfs, WLAN_DEBUG_DFS2, 932 "Rejecting on pri pri=%lld minpri=%u", 933 (uint64_t)deltaT, ft->ft_minpri); 934 tabledepth++; 935 continue; 936 } 937 938 __dfs_process_radarevent(dfs, ft, re, this_ts, found, 939 false_radar_found); 940 941 ft->ft_last_ts = this_ts; 942 *retval |= *found; 943 tabledepth++; 944 } 945 } 946 947 /** 948 * dfs_check_each_b5radar() - Check each bin5 radar 949 * @dfs: Pointer to wlan_dfs structure. 950 * @re: Pointer to re(radar event). 951 * @br: Pointer to dfs_bin5radars structure. 952 * @this_ts: Current time stamp 64bit. 953 * @diff_ts: Difference between 2 timestamps 32bit. 954 * @found: Pointer to found. If radar found or not. 955 */ 956 static inline void dfs_check_each_b5radar( 957 struct wlan_dfs *dfs, 958 struct dfs_event *re, 959 struct dfs_bin5radars *br, 960 uint64_t this_ts, 961 uint32_t diff_ts, 962 int *found) 963 { 964 if (dfs_bin5_check_pulse(dfs, re, br)) { 965 /* 966 * This is a valid Bin5 pulse, check if it belongs to a 967 * burst. 968 */ 969 (*re).re_dur = dfs_retain_bin5_burst_pattern(dfs, diff_ts, 970 (*re).re_dur); 971 /* 972 * Remember our computed duration for the next pulse in the 973 * burst (if needed). 974 */ 975 dfs->dfs_rinfo.dfs_bin5_chirp_ts = this_ts; 976 dfs->dfs_rinfo.dfs_last_bin5_dur = (*re).re_dur; 977 978 if (dfs_bin5_addpulse(dfs, br, re, this_ts)) 979 *found |= dfs_bin5_check(dfs); 980 } else { 981 dfs_debug(dfs, WLAN_DEBUG_DFS_BIN5_PULSE, 982 "not a BIN5 pulse (dur=%d)", (*re).re_dur); 983 } 984 } 985 986 /** 987 * dfs_check_if_bin5() - Check if bin5 radar is found 988 * @dfs: Pointer to wlan_dfs structure. 989 * @re: Pointer to re(radar event). 990 * @this_ts: Current time stamp 64bit. 991 * @diff_ts: Difference between 2 timestamps 32bit. 992 * @found: Pointer to found. If radar found or not. 993 */ 994 static inline void dfs_check_if_bin5( 995 struct wlan_dfs *dfs, 996 struct dfs_event *re, 997 uint64_t this_ts, 998 uint32_t diff_ts, 999 int *found) 1000 { 1001 int p; 1002 1003 /* BIN5 pulses are FCC and Japan specific. */ 1004 if ((dfs->dfsdomain == DFS_FCC_DOMAIN) || 1005 (dfs->dfsdomain == DFS_MKK4_DOMAIN) || 1006 (dfs->dfsdomain == DFS_MKKN_DOMAIN)) { 1007 for (p = 0; (p < dfs->dfs_rinfo.rn_numbin5radars) && (!*found); 1008 p++) { 1009 struct dfs_bin5radars *br; 1010 1011 br = &(dfs->dfs_b5radars[p]); 1012 dfs_check_each_b5radar(dfs, re, br, this_ts, diff_ts, 1013 found); 1014 } 1015 } 1016 1017 if (*found) 1018 dfs_debug(dfs, WLAN_DEBUG_DFS, "Found bin5 radar"); 1019 } 1020 1021 /** 1022 * dfs_skip_the_event() - Skip the Radar event 1023 * @dfs: Pointer to wlan_dfs structure. 1024 * @re: Pointer to re(radar event). 1025 * @rs: Pointer to dfs_state. 1026 */ 1027 static inline bool dfs_skip_the_event( 1028 struct wlan_dfs *dfs, 1029 struct dfs_event *re, 1030 struct dfs_state **rs) 1031 { 1032 if ((*re).re_chanindex < DFS_NUM_RADAR_STATES) 1033 (*rs) = &dfs->dfs_radar[(*re).re_chanindex]; 1034 else 1035 return 1; 1036 1037 if ((*rs)->rs_chan.dfs_ch_flagext & CHANNEL_INTERFERENCE) 1038 return 1; 1039 1040 return 0; 1041 } 1042 1043 /** 1044 * dfs_check_ts_wrap() - dfs check for timestamp wrap. 1045 * @dfs: Pointer to wlan_dfs structure. 1046 * @re: Pointer to re(radar event). 1047 * @deltafull_ts: Deltafull ts. 1048 * 1049 * Return: Deltafull ts. 1050 */ 1051 static inline uint64_t dfs_check_ts_wrap( 1052 struct wlan_dfs *dfs, 1053 struct dfs_event *re, 1054 uint64_t deltafull_ts) 1055 { 1056 if (deltafull_ts > 1057 ((uint64_t)((DFS_TSMASK - 1058 dfs->dfs_rinfo.rn_last_ts) + 1059 1 + (*re).re_ts))) 1060 deltafull_ts -= 1061 (DFS_TSMASK - dfs->dfs_rinfo.rn_last_ts) + 1062 1 + (*re).re_ts; 1063 1064 return deltafull_ts; 1065 } 1066 1067 /** 1068 * dfs_calculate_ts_prefix() - Calculate deltafull ts value. 1069 * @dfs: Pointer to wlan_dfs structure. 1070 * @re: Pointer to re(radar event). 1071 */ 1072 static inline void dfs_calculate_ts_prefix( 1073 struct wlan_dfs *dfs, 1074 struct dfs_event *re) 1075 { 1076 uint64_t deltafull_ts; 1077 1078 if ((*re).re_ts <= dfs->dfs_rinfo.rn_last_ts) { 1079 dfs->dfs_rinfo.rn_ts_prefix += (((uint64_t) 1) << DFS_TSSHIFT); 1080 /* Now, see if it's been more than 1 wrap */ 1081 deltafull_ts = (*re).re_full_ts - dfs->dfs_rinfo.rn_lastfull_ts; 1082 deltafull_ts = dfs_check_ts_wrap(dfs, re, deltafull_ts); 1083 deltafull_ts >>= DFS_TSSHIFT; 1084 1085 if (deltafull_ts > 1) 1086 dfs->dfs_rinfo.rn_ts_prefix += 1087 ((deltafull_ts - 1) << DFS_TSSHIFT); 1088 } else { 1089 deltafull_ts = (*re).re_full_ts - 1090 dfs->dfs_rinfo.rn_lastfull_ts; 1091 if (deltafull_ts > (uint64_t) DFS_TSMASK) { 1092 deltafull_ts >>= DFS_TSSHIFT; 1093 dfs->dfs_rinfo.rn_ts_prefix += 1094 ((deltafull_ts - 1) << DFS_TSSHIFT); 1095 } 1096 } 1097 } 1098 1099 /** 1100 * dfs_calculate_timestamps() - Calculate various timestamps 1101 * @dfs: Pointer to wlan_dfs structure. 1102 * @re: Pointer to re(radar event) 1103 * @this_ts : Pointer to this_ts (this timestamp) 1104 */ 1105 1106 static inline void dfs_calculate_timestamps( 1107 struct wlan_dfs *dfs, 1108 struct dfs_event *re, 1109 uint64_t *this_ts) 1110 { 1111 if (dfs->dfs_rinfo.rn_lastfull_ts == 0) { 1112 /* 1113 * Either not started, or 64-bit rollover exactly to 1114 * zero Just prepend zeros to the 15-bit ts. 1115 */ 1116 dfs->dfs_rinfo.rn_ts_prefix = 0; 1117 } else { 1118 /* WAR 23031- patch duplicate ts on very short pulses. 1119 * This pacth has two problems in linux environment. 1120 * 1)The time stamp created and hence PRI depends 1121 * entirely on the latency. If the latency is high, it 1122 * possibly can split two consecutive pulses in the 1123 * same burst so far away (the same amount of latency) 1124 * that make them look like they are from different 1125 * bursts. It is observed to happen too often. It sure 1126 * makes the detection fail. 1127 * 2)Even if the latency is not that bad, it simply 1128 * shifts the duplicate timestamps to a new duplicate 1129 * timestamp based on how they are processed. 1130 * This is not worse but not good either. 1131 * Take this pulse as a good one and create a probable 1132 * PRI later. 1133 */ 1134 if ((*re).re_dur == 0 && (*re).re_ts == 1135 dfs->dfs_rinfo.rn_last_unique_ts) { 1136 debug_dup[debug_dup_cnt++] = '1'; 1137 dfs_debug(dfs, WLAN_DEBUG_DFS1, "deltaT is 0"); 1138 } else { 1139 dfs->dfs_rinfo.rn_last_unique_ts = (*re).re_ts; 1140 debug_dup[debug_dup_cnt++] = '0'; 1141 } 1142 1143 if (debug_dup_cnt >= 32) 1144 debug_dup_cnt = 0; 1145 1146 dfs_calculate_ts_prefix(dfs, re); 1147 } 1148 1149 /* 1150 * At this stage rn_ts_prefix has either been blanked or 1151 * calculated, so it's safe to use. 1152 */ 1153 *this_ts = dfs->dfs_rinfo.rn_ts_prefix | ((uint64_t) (*re).re_ts); 1154 dfs->dfs_rinfo.rn_lastfull_ts = (*re).re_full_ts; 1155 dfs->dfs_rinfo.rn_last_ts = (*re).re_ts; 1156 } 1157 1158 /** 1159 * dfs_add_to_pulseline - Extract necessary items from dfs_event and 1160 * add it as pulse in the pulseline 1161 * @dfs: Pointer to wlan_dfs structure. 1162 * @re: Pointer to re(radar event) 1163 * @this_ts: Pointer to this_ts (this timestamp) 1164 * @diff_ts: Diff ts. 1165 * @index: Pointer to get index value. 1166 */ 1167 static inline void dfs_add_to_pulseline( 1168 struct wlan_dfs *dfs, 1169 struct dfs_event *re, 1170 uint64_t *this_ts, 1171 uint32_t *test_ts, 1172 uint32_t *diff_ts, 1173 uint32_t *index) 1174 { 1175 struct dfs_pulseline *pl; 1176 1177 /* 1178 * Calculate the start of the radar pulse. 1179 * 1180 * The TSF is stamped by the MAC upon reception of the event, 1181 * which is (typically?) at the end of the event. But the 1182 * pattern matching code expects the event timestamps to be at 1183 * the start of the event. So to fake it, we subtract the pulse 1184 * duration from the given TSF. This is done after the 64-bit 1185 * timestamp has been calculated so long pulses correctly 1186 * under-wrap the counter. Ie, if this was done on the 32 1187 * (or 15!) bit TSF when the TSF value is closed to 0, it will 1188 * underflow to 0xfffffXX, which would mess up the logical "OR" 1189 * operation done above. 1190 * This isn't valid for Peregrine as the hardware gives us the 1191 * actual TSF offset of the radar event, not just the MAC TSF 1192 * of the completed receive. 1193 * 1194 * XXX TODO: ensure that the TLV PHY error processing code will 1195 * correctly calculate the TSF to be the start of the radar 1196 * pulse. 1197 * 1198 * XXX TODO TODO: modify the TLV parsing code to subtract the 1199 * duration from the TSF, based on the current fast clock value. 1200 */ 1201 if ((!dfs->dfs_caps.wlan_chip_is_bb_tlv) && (*re).re_dur != 1) 1202 *this_ts -= (*re).re_dur; 1203 1204 pl = dfs->pulses; 1205 /* Save the pulse parameters in the pulse buffer(pulse line). */ 1206 *index = (pl->pl_lastelem + 1) & DFS_MAX_PULSE_BUFFER_MASK; 1207 1208 if (pl->pl_numelems == DFS_MAX_PULSE_BUFFER_SIZE) 1209 pl->pl_firstelem = (pl->pl_firstelem+1) & 1210 DFS_MAX_PULSE_BUFFER_MASK; 1211 else 1212 pl->pl_numelems++; 1213 1214 pl->pl_lastelem = *index; 1215 pl->pl_elems[*index].p_time = *this_ts; 1216 pl->pl_elems[*index].p_dur = (*re).re_dur; 1217 pl->pl_elems[*index].p_rssi = (*re).re_rssi; 1218 pl->pl_elems[*index].p_sidx = (*re).re_sidx; 1219 pl->pl_elems[*index].p_delta_peak = (*re).re_delta_peak; 1220 pl->pl_elems[*index].p_psidx_diff = (*re).re_psidx_diff; 1221 *diff_ts = (uint32_t)*this_ts - *test_ts; 1222 *test_ts = (uint32_t)*this_ts; 1223 1224 dfs_debug(dfs, WLAN_DEBUG_DFS1, 1225 "ts%u %u %u diff %u pl->pl_lastelem.p_time=%llu", 1226 (uint32_t)*this_ts, (*re).re_dur, 1227 (*re).re_rssi, *diff_ts, 1228 (uint64_t)pl->pl_elems[*index].p_time); 1229 } 1230 1231 /** 1232 * dfs_conditional_clear_delaylines - Clear delay lines to remove the 1233 * false pulses. 1234 * @dfs: Pointer to wlan_dfs structure. 1235 * @diff_ts: diff between timerstamps. 1236 * @this_ts: this timestamp value. 1237 * @re: Pointer to dfs_event structure. 1238 */ 1239 static inline void dfs_conditional_clear_delaylines( 1240 struct wlan_dfs *dfs, 1241 uint32_t diff_ts, 1242 uint64_t this_ts, 1243 struct dfs_event re) 1244 { 1245 struct dfs_pulseline *pl = dfs->pulses; 1246 uint32_t index; 1247 1248 /* If diff_ts is very small, we might be getting false pulse 1249 * detects due to heavy interference. We might be getting 1250 * spectral splatter from adjacent channel. In order to prevent 1251 * false alarms we clear the delay-lines. This might impact 1252 * positive detections under harsh environments, but helps with 1253 * false detects. 1254 */ 1255 1256 if (diff_ts < dfs->dfs_lowest_pri_limit) { 1257 dfs->dfs_seq_num = 0; 1258 dfs_reset_alldelaylines(dfs); 1259 dfs_reset_radarq(dfs); 1260 1261 index = (pl->pl_lastelem + 1) & DFS_MAX_PULSE_BUFFER_MASK; 1262 if (pl->pl_numelems == DFS_MAX_PULSE_BUFFER_SIZE) 1263 pl->pl_firstelem = (pl->pl_firstelem+1) & 1264 DFS_MAX_PULSE_BUFFER_MASK; 1265 else 1266 pl->pl_numelems++; 1267 1268 pl->pl_lastelem = index; 1269 pl->pl_elems[index].p_time = this_ts; 1270 pl->pl_elems[index].p_dur = re.re_dur; 1271 pl->pl_elems[index].p_rssi = re.re_rssi; 1272 pl->pl_elems[index].p_sidx = re.re_sidx; 1273 pl->pl_elems[index].p_delta_peak = re.re_delta_peak; 1274 pl->pl_elems[index].p_psidx_diff = re.re_psidx_diff; 1275 dfs->dfs_seq_num++; 1276 pl->pl_elems[index].p_seq_num = dfs->dfs_seq_num; 1277 } 1278 } 1279 1280 /** 1281 * dfs_process_each_radarevent - remove each event from the dfs radar queue 1282 * and process it. 1283 * @dfs: Pointer to wlan_dfs structure. 1284 * @chan: Pointer to DFS current channel. 1285 * @rs: Pointer to dfs_state structure. 1286 * @seg_id: segment id. 1287 * @retval: pointer to retval. 1288 * @false_radar_found: pointer to false radar found. 1289 * 1290 * Return: If radar found then return 1 else return 0. 1291 */ 1292 static inline int dfs_process_each_radarevent( 1293 struct wlan_dfs *dfs, 1294 struct dfs_channel *chan, 1295 struct dfs_state **rs, 1296 uint8_t *seg_id, 1297 int *retval, 1298 int *false_radar_found) 1299 { 1300 struct dfs_event re, *event; 1301 int found, empty; 1302 int events_processed = 0; 1303 uint64_t this_ts; 1304 static uint32_t test_ts; 1305 static uint32_t diff_ts; 1306 uint32_t index; 1307 1308 dfs_is_radarq_empty(dfs, &empty); 1309 1310 while ((!empty) && (!*retval) && !(*false_radar_found) && 1311 (events_processed < MAX_EVENTS)) { 1312 dfs_remove_event_from_radarq(dfs, &event); 1313 if (!event) { 1314 empty = 1; 1315 break; 1316 } 1317 events_processed++; 1318 re = *event; 1319 1320 dfs_return_event_to_eventq(dfs, event); 1321 1322 *seg_id = re.re_seg_id; 1323 found = 0; 1324 if (dfs_skip_the_event(dfs, &re, rs)) { 1325 dfs_is_radarq_empty(dfs, &empty); 1326 continue; 1327 } 1328 1329 dfs_calculate_timestamps(dfs, &re, &this_ts); 1330 1331 re.re_dur = dfs_process_pulse_dur(dfs, re.re_dur); 1332 1333 dfs_add_to_pulseline(dfs, &re, &this_ts, &test_ts, &diff_ts, 1334 &index); 1335 1336 dfs_dur_check(dfs, chan, &re, diff_ts); 1337 1338 dfs_log_event(dfs, &re, this_ts, diff_ts, index); 1339 1340 dfs_conditional_clear_delaylines(dfs, diff_ts, this_ts, re); 1341 1342 found = 0; 1343 if (events_processed == 1) { 1344 dfs->dfs_min_sidx = (re).re_sidx; 1345 dfs->dfs_max_sidx = (re).re_sidx; 1346 } 1347 1348 dfs_check_if_bin5(dfs, &re, this_ts, diff_ts, &found); 1349 if (found) { 1350 *retval |= found; 1351 dfs->dfs_freq_offset = DFS_SIDX_TO_FREQ_OFFSET( 1352 (dfs->dfs_min_sidx + dfs->dfs_max_sidx) / 2); 1353 return 1; 1354 } 1355 1356 dfs_check_if_nonbin5(dfs, &re, rs, this_ts, diff_ts, &found, 1357 retval, false_radar_found); 1358 1359 dfs_is_radarq_empty(dfs, &empty); 1360 } 1361 1362 return 0; 1363 } 1364 1365 /** 1366 * dfs_false_radarfound_reset_vars () - Reset dfs variables after false radar 1367 * found. 1368 * @dfs: Pointer to wlan_dfs structure. 1369 */ 1370 void dfs_false_radarfound_reset_vars( 1371 struct wlan_dfs *dfs) 1372 { 1373 dfs->dfs_seq_num = 0; 1374 dfs_reset_radarq(dfs); 1375 dfs_reset_alldelaylines(dfs); 1376 dfs->dfs_phyerr_freq_min = 0x7fffffff; 1377 dfs->dfs_phyerr_freq_max = 0; 1378 dfs->dfs_phyerr_w53_counter = 0; 1379 dfs->dfs_event_log_count = 0; 1380 dfs->dfs_phyerr_count = 0; 1381 dfs->dfs_phyerr_reject_count = 0; 1382 dfs->dfs_phyerr_queued_count = 0; 1383 } 1384 1385 /** 1386 * dfs_process_radarevent() - For Full Offload, FW sends segment id,freq_offset 1387 * and chirp information and gets assigned when there is radar detect. In 1388 * case of radartool bangradar enhanced command and real radar for DA and PO, 1389 * we assign these information here. 1390 * 1391 * @dfs: Pointer to wlan_dfs structure. 1392 * @radar_found: Pointer to radar_found_info structure. 1393 */ 1394 1395 static void 1396 dfs_fill_radar_found_info(struct wlan_dfs *dfs, 1397 struct radar_found_info *radar_found) 1398 { 1399 radar_found->segment_id = dfs->dfs_seg_id; 1400 radar_found->freq_offset = dfs->dfs_freq_offset; 1401 radar_found->is_chirp = dfs->dfs_is_chirp; 1402 } 1403 1404 void dfs_radarfound_action_generic(struct wlan_dfs *dfs, uint8_t seg_id) 1405 { 1406 struct radar_found_info *radar_found; 1407 1408 radar_found = qdf_mem_malloc(sizeof(*radar_found)); 1409 if (!radar_found) 1410 return; 1411 1412 qdf_mem_zero(radar_found, sizeof(*radar_found)); 1413 radar_found->segment_id = seg_id; 1414 dfs->dfs_seg_id = seg_id; 1415 radar_found->pdev_id = 1416 wlan_objmgr_pdev_get_pdev_id(dfs->dfs_pdev_obj); 1417 1418 dfs_fill_radar_found_info(dfs, radar_found); 1419 dfs_process_radar_ind(dfs, radar_found); 1420 qdf_mem_free(radar_found); 1421 } 1422 1423 #if defined(WLAN_DFS_PARTIAL_OFFLOAD) && defined(HOST_DFS_SPOOF_TEST) 1424 static bool dfs_is_spoof_needed(struct wlan_dfs *dfs) 1425 { 1426 return ((utils_get_dfsdomain(dfs->dfs_pdev_obj) == DFS_FCC_DOMAIN) && 1427 (lmac_is_host_dfs_check_support_enabled(dfs->dfs_pdev_obj)) && 1428 (dfs->dfs_spoof_test_done ? dfs->dfs_use_nol : 1)); 1429 } 1430 #else 1431 static inline bool dfs_is_spoof_needed(struct wlan_dfs *dfs) 1432 { 1433 return false; 1434 } 1435 #endif 1436 1437 /** 1438 * dfs_radar_found_action() - Radar found action 1439 * @dfs: Pointer to wlan_dfs structure. 1440 * @bangradar: true if radar is due to bangradar command. 1441 * @seg_id: Segment id. 1442 */ 1443 static void dfs_radar_found_action(struct wlan_dfs *dfs, 1444 bool bangradar, 1445 uint8_t seg_id) 1446 { 1447 /* If Host DFS confirmation is supported, save the curchan as 1448 * radar found chan, send radar found indication along with 1449 * average radar parameters to FW and start the host status 1450 * wait timer. 1451 */ 1452 if (!bangradar && dfs_is_spoof_needed(dfs)) { 1453 dfs_radarfound_action_fcc(dfs, seg_id); 1454 } else { 1455 dfs_radarfound_action_generic(dfs, seg_id); 1456 } 1457 } 1458 1459 /** 1460 * dfs_radar_pulse_event_basic_sanity() - Check if radar pulse event is received 1461 * on a DFS channel or Zero CAC agile channel. 1462 * @dfs: Pointer to wlan_dfs structure. 1463 * @chan: Current channel. 1464 * 1465 * Return: If a radar pulse event is received on DFS channel or zero cac agile 1466 * channel return true. Otherwise, return false. 1467 */ 1468 static 1469 bool dfs_radar_pulse_event_basic_sanity(struct wlan_dfs *dfs, 1470 struct dfs_channel *chan) 1471 { 1472 if (!chan) { 1473 dfs_err(dfs, WLAN_DEBUG_DFS1, 1474 "dfs->dfs_curchan is NULL"); 1475 return false; 1476 } 1477 1478 if (!WLAN_IS_PRIMARY_OR_SECONDARY_CHAN_DFS(chan)) { 1479 dfs_debug(dfs, WLAN_DEBUG_DFS1, 1480 "radar event on a non-DFS chan"); 1481 dfs_reset_radarq(dfs); 1482 dfs_reset_alldelaylines(dfs); 1483 dfs_reset_bangradar(dfs); 1484 return false; 1485 } 1486 return true; 1487 } 1488 1489 void dfs_process_radarevent( 1490 struct wlan_dfs *dfs, 1491 struct dfs_channel *chan) 1492 { 1493 struct dfs_state *rs = NULL; 1494 uint8_t seg_id = 0; 1495 int retval = 0; 1496 int false_radar_found = 0; 1497 bool bangradar = false; 1498 1499 if (!dfs_radar_pulse_event_basic_sanity(dfs, chan)) 1500 return; 1501 1502 /* 1503 * TEST : Simulate radar bang, make sure we add the channel to NOL 1504 * (bug 29968) 1505 */ 1506 if (dfs_handle_bangradar(dfs, chan, &rs, &seg_id, &retval)) { 1507 if (retval) 1508 bangradar = true; 1509 goto dfsfound; 1510 } 1511 1512 if (!dfs_handle_missing_pulses(dfs, chan)) 1513 return; 1514 1515 dfs_process_each_radarevent(dfs, chan, &rs, &seg_id, &retval, 1516 &false_radar_found); 1517 1518 dfsfound: 1519 if (retval) { 1520 dfs_radarfound_reset_vars(dfs, rs, chan, seg_id); 1521 dfs_radar_found_action(dfs, bangradar, seg_id); 1522 } 1523 1524 if (false_radar_found) 1525 dfs_false_radarfound_reset_vars(dfs); 1526 } 1527